json_str = """
{"car":"皖A9A7N2","city_code":"340500","county_code":"340522","card":117970031606010,"camera_id":"01214","orientation":"西北","road_id":34053118,"time":1614712022,"speed":75.29}
"""

import json

json_dict = json.loads(json_str)
print(json_dict)
print(json_dict["card"])
